Pseudogap, charge order, and pairing density wave at the hot spots in cuprate superconductors

We address the timely issue of the presence of charge ordering at the hot-spots in the pseudo-gap phase of cuprate superconductors in the context of an emergent SU(2)-symmetry which relates the charge and pairing sectors. Performing the Hubbard-Stratonovich decoupling such that the free energy stays always real and physically meaningful we exhibit three solutions of the spin-fermion model at the hot spots. A careful examination of their stability and free energy shows that, at low temperature, the system tends towards a co-existence of charge density wave (CDW) and the composite order parameter made of diagonal quadrupolar density wave and pairing fluctuations of Ref. [Nat. Phys. $\bf{9}$, 1745 (2013)].The CDW is sensitive to the shape of the Fermi surface in contrast to the diagonal quadrupolar order, which is immune to it. SU(2) symmetry within the pseudo-gap phase also applies to the CDW state, which therefore admits a pairing density pave counterpart breaking time reversal symmetry.Comment: 15 pages, 15 figures, final version + typo corrected in Eq. (12

Charge orders, magnetism and pairings in the cuprate superconductors

We review the recent developments in the field of cuprate superconductors with the special focus on the recently observed charge order in the underdoped compounds. We introduce new theoretical developments following the study of the antiferromagnetic (AF) quantum critical point (QCP) in two dimensions, in which preemptive orders in the charge and superconducting (SC) sectors emerged, that are in turn related by an SU(2) symmetry. We consider the implications of this proliferation of orders in the underdoped region, and provide a study of the type of fluctuations which characterize the SU(2) symmetry. We identify an intermediate energy scale where the SU(2) pairing fluctuations are dominant and argue that they are unstable towards the formation of a Resonant Peierls Excitonic (RPE) state at the pseudogap (PG) temperature $T^{*}$. We discuss the implications of this scenario for a few key experiments.Comment: 16 pages, 17 figure

Building the legal knowledge graph for smart compliance services in multilingual Europe

This position paper describes the vision, objectives and methodology of the LYNX project. The aim of Lynx is to create services to better manage compliance, based on a legal knowledge graph which integrates and links heterogeneous compliance data sources including legislation, case law and standards

The speciation of Noctua atlantica (Lepidoptera, Noctuidae) occurred in the Azores as supported by a molecular clock based on mitochondrial COI sequences

The complete sequence of the cytochrome c oxidase subunit I (COI) gene of Noctua atlantica (Warren, 1905) has been determined and deposited in the NCBI GenBank under the Accession number AY600452. Complete and partial COI sequences of other Lepidoptera have been collected and used to reconstruct a phylogeny with both the Neighbor-Joining and the Maximum Likelihood methods. A molecular clock calibrated for our models indicate a divergence time between Noctua atlantica and Noctua pronuba of 4.7-5.9 Million years, consistent with the geological age of the Azores and suggesting that the speciation process of N. atlantica occurred in this archipelago

Photometric single-view dense 3D reconstruction in endoscopy

Visual SLAM inside the human body will open the way to computer-assisted navigation in endoscopy. However, due to space limitations, medical endoscopes only provide monocular images, leading to systems lacking true scale. In this paper, we exploit the controlled lighting in colonoscopy to achieve the first in-vivo 3D reconstruction of the human colon using photometric stereo on a calibrated monocular endoscope. Our method works in a real medical environment, providing both a suitable in-place calibration procedure and a depth estimation technique adapted to the colon's tubular geometry. We validate our method on simulated colonoscopies, obtaining a mean error of 7% on depth estimation, which is below 3 mm on average. Our qualitative results on the EndoMapper dataset show that the method is able to correctly estimate the colon shape in real human colonoscopies, paving the ground for truescale monocular SLAM in endoscopy

Activation of Store-Operated Ca2+ Current in Xenopus Oocytes Requires SNAP-25 but Not a Diffusible Messenger

AbstractDepletion of Ca2+ stores in Xenopus oocytes activated entry of Ca2+ across the plasma membrane, which was measured as a current ISOC in subsequently formed cell-attached patches. ISOC survived excision into inside-out configuration. If cell-attached patches were formed before store depletion, ISOC was activated outside but not inside the patches. ISOC was potentiated by microinjection of Clostridium C3 transferase, which inhibits Rho GTPase, whereas ISOC was inhibited by expression of wild-type or constitutively active Rho. Activation of ISOC was also inhibited by botulinum neurotoxin A and dominant-negative mutants of SNAP-25 but was unaffected by brefeldin A. These results suggest that oocyte ISOC is dependent not on aqueous diffusible messengers but on SNAP-25, probably via exocytosis of membrane channels or regulatory molecules

Trombosis de la arteria humeral secundaria a malformación de la primera costilla

We present a case of a healthy 52-year-old man who came to our clinic because he suffered fatigue in the upper left limb during the past 4 months. Progressively he developed claudication with minimum efforts and nocturnal pain that awoke him, tingles, coldness and pallor in the whole hand. Cervical, shoulder, elbow, and wrist mobility and muscle power were normal. There was absence of left axillary, humeral, radial and ulnar pulses, with a left subclavian pulse present. Echo-Doppler and CT angiography revealed axillary and brachial artery thrombosis secondary to a narrow left intercostoscalenic space due to agenesis of the first ribs? anterior arch and synchorosis of the costal remnant with the second rib. The first two ribs were resected, and an axillary artery endoprosthesis and an axillary-radial bypass were implanted, achieving adequate distal reperfusion. Eight months later, the patient has no pain and is asymptomatic

Negociaciones de máxima probabilidad para juegos cooperativos con fines comerciales

Maximum Probability Negotiations in Cooperative Games with Commercial PurposesThis work presents a method to find the payment strategy that maximizes the probability of closing a negotiation in cooperative scenarios of transferable utility for commercial purposes. This procedure uses a simulation tool called JDSIM to sample the core of the game and generate cumulative empirical probability functions of the payments of each actor in order to establish the negotiation that maximizes the product of these functions. This method is compared with other two methods already established in the literature, called Shapley Value (SV) and the centroid of the Core, through thirty random scenarios and a practical case in which it is observed that this always offers unique and implementable solutions, and provides a rational justification unlike those already mentioned. It should be borne in mind that this work is only intended to resolve negotiations in which the distribution of payments allows all actors to unite in a single coalition; however, the paradigm presented can be adapted to smaller sub-coalitions to extend its scope. This solution proposes a better alternative to those found in the literature and represents an important advance in areas of negotiation and game theory.El objetivo de este trabajo presenta un método para encontrar la estrategia de pagos que maximiza la probabilidad de cerrar una negociación en escenarios cooperativos de utilidad transferible con fines comerciales. Este procedimiento utiliza una herramienta de simulación llamada JDSIM para muestrear el Core del juego y generar funciones empíricas de probabilidad acumuladas de los pagos de cada actor con el fin de establecer la negociación que maximiza el producto de estas funciones. Este método se compara con otros dos ya establecidos en la literatura, llamados Shapley Value (SV) y el centroide del Core, a través de treinta escenarios aleatorios y un caso práctico en los que se observa que este siempre ofrece soluciones únicas, implementables, y proporciona una justificación racional, a diferencia de los ya mencionados. Hay que considerar que este trabajo únicamente pretende resolver negociaciones en las que la distribución de los pagos permite a todos los actores unirse en una sola coalición, sin embargo, el paradigma presentado se puede adaptar a subcoaliciones de menor tamaño para extender su alcance. Esta solución propone una mejor alternativa a las que se encuentran en la literatura y representa un avance importante en áreas de negociación y teoría de juegos